How to register a user input to a list C#

Hi im trying to get a user to make a list of words. Next step is for the user to type one of the words again and then the program will check for anagrams in the list. I have found a way to solve it but ONLY when checking my own list.
I would like to know how to do what I need. no need for exact code answear just some help on the way. Still New at C# and coding. Dont mind the swedish comments.

The solution is actually quite simple.
You just have to check every word which fits the amount of letters, if they share the same letters.

E.g. word has 4 letters. If a user types in what which has 5 letters they can't possible match. But if he types in darn which is also 4 u just have to check if all letters match.

One should keep an eye on Case-Sensitivity, which I left out to make the answer more simple.
As well there are numerous ways to improve this code which i left out. All in the name of simplicity :)

static void Main(string[] param)
{
//The list of Words which are anagrams
List<string> solutions = new List<string>();
//get the user input
string userInput = "User writes arm ram kola like hi"; //Replace with Console.ReadLine().ToLower(); and don't forget to prompt the userwith input
//split it into the diffrent words
string[] words = userInput.Split(' ');
//get the users "match want"
string userMatchWant = "mar"; //Replace with Console.ReadLine().ToLower(); and don't forget to prompt the userwith input
//Find words wich are as long as mar
foreach (string word in words)
{
//if they arn't the same length it can't be an anagramm
if (word.Length != userMatchWant.Length)
continue;
//To Determin if all characters of the words are the same
bool hasOnlyTheSameLetters = false;
//now check if all characters contains
foreach (char c in word)
{
//If The lette is in the word assume it contains only of the letters that we are looking for, because
if (userMatchWant.Contains(c.ToString()))
hasOnlyTheSameLetters = true;
//else we know it has a different word so we can breack and check the other input words.
else
{
hasOnlyTheSameLetters = false;
break;
}
}
//if there is a diffrence in letters contine
if (hasOnlyTheSameLetters == false)
continue;
//else add the word to the solution
else
solutions.Add(word);
}
//Print the solutions
if(solutions.Count > 0)
{
Console.Write("Anagrams: ");
foreach (string s in solutions)
Console.Write( s + " ");
Console.WriteLine();
}
Console.ReadKey();
}

For all you LINQ fanatics out there, this is the shortest way I could come up with, to replace the foreach(string word in words) - Loop:var totalMatches = words.Where(p => p.Length == userMatchWant.Length).Where(p => p.All(c => userMatchWant.Contains(c.ToString())));